1、Designation: C 847 09Standard Specification forMetal Lath1This standard is issued under the fixed designation C 847; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the y
2、ear of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope*1.1 This specification covers sheet lath, expanded metallath, diamond mesh, flat and self-furr
3、ing, and rib metal lath,18and38 in. (3.2 and 9.6 mm), all with or without backing anddesigned to be used as a base for gypsum or portland cementplaster.1.2 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units tha
4、t are provided for information onlyand are not considered standard.2. Referenced Documents2.1 ASTM Standards:2A 653/A 653M Specification for Steel Sheet, Zinc-Coated(Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed)by the Hot-Dip Process3. Material3.1 Metal lath shall be fabricated from cold-roll
5、ed carbonsteel sheet of commercial quality conforming to SpecificationA 653/A 653M. Galvanized metal lath shall have a G60coating in accordance with Specification A 653/A 653M.3.2 Backing shall be attached to the lath sufficiently enoughto prevent accidental removal during shipping, handling, orinst
6、allation. Attachment of backing shall also allow lapping ofmetal to metal and backing to backing, 1 in. (25.4 mm) on theends and12 in. (12.7 mm) on the sides.4. Dimensions, Mass, and Permissible Variations4.1 ThicknessThe nominal thickness of diamond meshand flat rib metal lath shall be18 in. (3.2 m
7、m). The nominalthickness of other rib metal lath shall be as designated,38 in.(9.6 mm). The nominal thickness of self-furring diamond meshshall be516 in. (7.9 mm).4.2 WidthThe nominal width of metal lath shall be 27 in.(686 mm).4.3 LengthThe nominal length of metal lath shall be 96in. (2438 mm).4.4
8、WeightThe nominal weight of metal lath shall be asfollows:4.4.1 U.S. Nominal Weights:Type: Weight, lb/yd2(kg/m2)Diamond mesh 2.5 (1.4); 3.4 (1.8)Flat rib 1.8 (1.0); 2.75 (1.5); 3.4 (1.8)38-in. rib 3.4 (1.8); 4.0 (2.1)Sheet 4.5 (2.4)4.4.2 Canadian Nominal Weights:Type: Weight, lb/yd2(kg/m2)Diamond me
9、sh 2.5 (1.4); 3.0 (1.6); 3.4 (1.8)Flat rib 1.8 (1.0); 2.5 (1.4); 3.0 (1.6)38-in. rib 3.0 (1.6); 3.5 (1.9); 4.0 (2.1)4.5 Permissible VariationsThe permissible variationsshall be as follows:4.5.1 Thickness, 6164 in. (0.4 mm).4.5.2 Width, 638 in. (9.5 mm).4.5.3 Length,0in.,+212 in. (63.5 mm).4.5.4 Weig
10、ht, 6 10 %.5. Finish5.1 Metal lath shall be fabricated from hot-dipped galva-nized steel.6. Inspection6.1 Inspection of the material shall be agreed upon betweenthe purchaser and supplier as part of the purchase contract.7. Rejection and Rehearing7.1 Any rejection shall be based upon the specific ca
11、use offailure to conform to the requirements of this specification, andshall be reported to the seller within 10 working days from thereceipt of the shipment by the purchaser.1This specification is under the jurisdiction of ASTM Committee C11 onGypsum and Related Building Materials and Systems and i
12、s the direct responsibilityof Subcommittee C11.02 on Specifications and Test Methods for Accessories andRelated Products.Current edition approved May 1, 2009. Published May 2009. Originallyapproved in 1977. Last previous edition approved in 2006 as C 847 06.2For referenced ASTM standards, visit the
13、ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Ba
14、rr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.7.2 Claims for rehearing shall be valid only if made within20 working days from receipt of notice of specific cause forrejection.8. Certification8.1 Where specified in the purchase order, a producers orsuppliers certificat
15、ion shall be furnished to the purchaser thatthe material was in accordance with this specification and hasbeen found to meet the specified requirements.9. Packaging and Package Marking9.1 Metal lath shall be packaged ten sheets per bundle, andself-furring lath shall be five or ten sheets per bundle
16、(option ofmanufacturer).9.2 When shipped for resale, the name of the manufactureror the supplier and the brand shall be legibly marked on eachlath or package.10. Keywords10.1 gypsum cement plaster; lath; metal lath; portlandcement plaster; rib lath; self-furring; sheet lathSUMMARY OF CHANGESCommitte
17、e C11 has identified the location of selected changes to this specification since the last issue,C 847 06, that may impact the use of this specification. (Approved May 1, 2009)(1) Revised the tolerance in 4.5.2 from316 in. to38 in.ASTM International takes no position respecting the validity of any p
18、atent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revisi
19、on at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your co
20、mments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrigh
21、ted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).C847092
